<template>
  <div>
    <div>
      <el-input style="width: 200px" placeholder="查询标题" v-model="title"/>
      <el-button type="success" style="margin-left: 10px" @click="load(1)">查询</el-button>
      <el-button type="warning" @click="reset">重置</el-button>
    </div>
    <div style="margin: 10px">
      <el-button type="primary" plain @click="handleAdd">新增</el-button>
      <el-button type="danger"  plain @click="delBatch">批量删除</el-button>
    </div>
    <el-table :data="tableData" stripe :header-cell-style="{ backgroundColor: 'aliceblue', color: '#666'}" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center"/>
      <el-table-column label="课程号" prop="id" width="70" align="center"/>
      <el-table-column label="课程名" prop="title" align="center"/>
      <el-table-column label="课程简介" prop="description" align="center"/>
      <el-table-column label="课程内容" prop="content" align="center">
        <template v-slot="scope">
          <el-button @click="showContent(scope.row.content)" size="mini">
            显示内容
          </el-button>
        </template>
      </el-table-column>
      <el-table-column label="详情页" prop="content" align="center">
        <template v-slot="scope">
          <el-button @click="$router.push('/newsDetail?id=' + scope.row.id)" size="mini">
            在详情页显示
          </el-button>
        </template>
      </el-table-column>
      <el-table-column label="发布人" prop="author" align="center"/>
      <el-table-column label="发布时间" prop="time" align="center"/>

      <el-table-column label="操作" align="center" width="180px">
        <template v-slot="scope">
          <el-button size="mini" type="primary" plain @click="handleEdit(scope.row)">编辑</el-button>
          <el-button size="mini" type="danger" plain @click="del(scope.row.id)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <div style="margin: 10px 0">
      <el-pagination
          background
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-size="pageSize"
          layout="total, prev, pager, next"
          :total="total">
      </el-pagination>
    </div>

    <el-dialog title="新闻信息" :visible.sync="formVisible" width="60%" @close="closeDialog" :close-on-click-modal="false">
      <el-form :model="form" label-width="80px" style="margin-right: 20px" :rules="rules" ref="formRef">

        <el-form-item label="标题" prop="title">
          <el-input v-model="form.title" placeholder="标题"/>
        </el-form-item>
        <el-form-item label="简介" prop="description">
          <el-input v-model="form.description" placeholder="简介"/>
        </el-form-item>
        <el-form-item label="内容" prop="content">
          <div id="editor"/>
        </el-form-item>
      </el-form>

      <div slot="footer" class="dialog-footer">
        <el-button @click="formVisible = false">取 消</el-button>
        <el-button type="primary" @click="save">确 定</el-button>
      </div>
    </el-dialog>

    <el-dialog title="内容" :visible.sync="formVisible1" width="60%">
      <el-card class="w-e-text">
        <div v-html="content"/>
      </el-card>

      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="formVisible1 = false">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import E from "wangeditor"
import hljs from "highlight.js";
  export default {
    name: "News",
    data() {
      return {
        tableData: [],  // 所有数据
        pageNum: 1,  // 当前页
        pageSize: 5,  // 没页显示个数
        username: '',
        title: '',
        total: 0,
        formVisible: false,
        form: {},
        user: JSON.parse(localStorage.getItem('honey-user') || '{}'),
        rules: {
          title: [
            { required: true, message: '请输入标题', trigger: 'blur'},
          ],
        },
        ids: [],
        editor: null,
        content: '',
        formVisible1: false
      }
    },
    created(){
      this.load()
    },
    methods: {
      showContent(content) {
        this.content = content
        this.formVisible1 = true
      },
      closeDialog() {
        // 销毁编辑器
        this.editor.destroy()
        this.editor = null
      },
      delBatch() {
        if (!this.ids.length) {
          this.$message.warning("请选择数据")
          return
        }
        this.$confirm("您确认批量删除数据吗？", "确认删除",{type: "warning"}).then(response => {
          this.$request.delete('/news/delete/batch', {data: this.ids} ).then(res => {
            if (res.code === '200') { // 操作成功
              this.$message.success("操作成功")
              this.load(1)
            } else {
              this.$message.error(res.msg)  // 弹出错误信息
            }
          })
        })
      },
      handleSelectionChange(rows) {  // 当前选中的所有数据
        this.ids = rows.map(v => v.id)
      },
      del(id) {
        this.$confirm('确认删除吗？','确认删除',{type: "warning"}).then(response => {
          this.$request.delete('/news/delete/' + id ).then(res => {
            if (res.code === '200') { // 操作成功
              this.$message.success("操作成功")
              this.load(1)
            } else {
              this.$message.error(res.msg)  // 弹出错误信息
            }
          })
        }).catch(() => {})
      },
      setRichText() {
        this.$nextTick( () => {  // 时钟  div 渲染完成后创建富文本区域
          this.editor = new E(`#editor`)
          this.editor.highlight = hljs // 代码高亮

          // 上传图片
          // this.editor.config.uploadImgServer = this.$baseUrl + '/file/editor/upload'
          this.editor.config.uploadImgServer = 'http://localhost:9999' + '/file/editor/upload'
          this.editor.config.uploadFileName = 'file'
          this.editor.config.uploadImgHeaders = {
            token : this.user.token
          }
          this.editor.config.uploadImgParams = {
            type: 'img',
          }

          // 上传视频
          this.editor.config.uploadVideoServer = 'http://localhost:9999' + '/file/editor/upload'
          this.editor.config.uploadVideoName = 'file'
          this.editor.config.uploadVideoHeaders = {
            token : this.user.token
          }
          this.editor.config.uploadVideoParams = {
            type: 'video',
          }

          this.editor.create() // 创建

        })
      },
      handleEdit(row) {  // 编辑数据
        this.form = JSON.parse(JSON.stringify(row)) // 给 form 对象赋值,注意要深拷贝数据
        this.formVisible = true // 打开弹窗

        this.setRichText()
        setTimeout( () => { // 延迟设置
          this.editor.txt.html(row.content) // 设置内容
        },0)

      },
      handleAdd() {  // 新增数据
        this.form = {}  // 新增数据的时候清空数据
        this.formVisible = true // 打开弹窗

        this.setRichText()
      },
      save() { // 保存按钮触发逻辑 触发新增或更新
        this.$refs.formRef.validate((valid) => {
          if (valid) {
            // 获取编辑框的内容
            let content = this.editor.txt.html()
            this.form.content = content
            this.$request({
              url: this.form.id ? '/news/update' : '/news/add',
              method: this.form.id ? 'PUT' : 'POST',
              data: this.form
            }).then(res => {
              if (res.code === '200') { // 成功保存
                this.$message.success("保存成功")
                this.load(1)
                this.formVisible = false // 关闭弹窗
              } else {
                this.$message.error(res.msg)  // 弹出错误信息
              }
            })
          }
        })
      },
      reset() {
        this.title = '',
        this.load()
      },
      load(pageNum) {
        if (pageNum) this.pageNum = pageNum
        this.$request.get('/news/selectByPage', {
          params: {
            pageNum: this.pageNum,
            pageSize: this.pageSize,
            title: this.title,
          }
        }).then(res => {
          this.tableData = res.data.records
          this.total = res.data.total
        })
      },
      handleCurrentChange(pageNum) {
        this.load(pageNum)
      },
    }
  }
</script>

<style>

</style>
